INTRODUCTION
This is the second part of a two-paper series dealing with
harmonic analysis in Wind Power Plants (WPPs). The first
part of the paper presented a theoretical basis on harmonic
performance of Wind turbine Generators (WTGs), and
discussed about the modeling methodology for the WTG and
Balance of Plant (BOP) components for harmonic studies in
WPPs.
Harmonics generated by Voltage Source Converter (VSC)-
based WTGs do not remain constant but vary according to the
converter control and the switching scheme. Harmonic
signature of these devices cannot therefore be predicted by
mathematical equations such as Fourier analysis. It is
therefore necessary to investigate the harmonic profiles
obtained from field measurements thoroughly such that some
commonalties can be drawn for various turbine types, and
various operating conditions. Results obtained from filed
measurements of harmonic in WPPs have been discussed in a
number of technical literature [1-8]. All these papers,
however, report the aggregate harmonic signature of the
WPP. This will include the combined effect of the WTG and
all other BOP components which does not therefore provide
any insight on precise harmonic performance of the WTG.
The accompanying paper has proposed the methodology
for conducting power systems harmonic studies for WPPs and
the required models for individual components. With this